Ensure correct visibility handling for Undo and Follow requests

[pfefferle]

Make sure to retain the visibility settings of the original object when performing an Undo, and send Follow requests only to the platform where the followed account resides.

Proposed changes:

• Preserve the visibility of the original Activity when sending an Undo.
• Send Follow requests with private visibility.

Other information:

• Have you written new tests for your changes, if applicable?

Testing instructions:

• Go to '..'

Changelog entry

• Automatically create a changelog entry from the details below.

Changelog Entry Details

Significance

• Patch
• Minor
• Major

Type

• Added - for new features
• Changed - for changes in existing functionality
• Deprecated - for soon-to-be removed features
• Removed - for now removed features
• Fixed - for any bug fixes
• Security - in case of vulnerabilities

Message

Ensure correct visibility handling for Undo and Follow requests

[Copilot]

Pull Request Overview

This PR fixes visibility handling for ActivityPub Undo and Follow requests to ensure proper privacy controls. The changes preserve original activity visibility when undoing actions and set appropriate privacy levels for follow requests.

• Preserve original activity visibility when creating Undo requests
• Set Follow requests to use private visibility by default

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
includes/collection/class-outbox.php	Retrieves and preserves original activity visibility when creating undo operations
includes/collection/class-following.php	Sets follow requests to use private visibility constant

[obenland]

Nice catch!